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1 | /* Header file for gimple iterators. |
2 | Copyright (C) 2013 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GCC. | |
5 | ||
6 | GCC is free software; you can redistribute it and/or modify it under | |
7 | the terms of the GNU General Public License as published by the Free | |
8 | Software Foundation; either version 3, or (at your option) any later | |
9 | version. | |
10 | ||
11 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
12 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
14 | for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GCC; see the file COPYING3. If not see | |
18 | <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #ifndef GCC_GIMPLE_ITERATOR_H | |
21 | #define GCC_GIMPLE_ITERATOR_H | |
22 | ||
23 | /* Iterator object for GIMPLE statement sequences. */ | |
24 | ||
25 | typedef struct gimple_stmt_iterator_d | |
26 | { | |
27 | /* Sequence node holding the current statement. */ | |
28 | gimple_seq_node ptr; | |
29 | ||
30 | /* Sequence and basic block holding the statement. These fields | |
31 | are necessary to handle edge cases such as when statement is | |
32 | added to an empty basic block or when the last statement of a | |
33 | block/sequence is removed. */ | |
34 | gimple_seq *seq; | |
35 | basic_block bb; | |
36 | } gimple_stmt_iterator; | |
37 | ||
38 | extern void gsi_insert_seq_before_without_update (gimple_stmt_iterator *, | |
39 | gimple_seq, | |
40 | enum gsi_iterator_update); | |
41 | extern void gsi_insert_seq_before (gimple_stmt_iterator *, gimple_seq, | |
42 | enum gsi_iterator_update); | |
43 | extern void gsi_insert_seq_after_without_update (gimple_stmt_iterator *, | |
44 | gimple_seq, | |
45 | enum gsi_iterator_update); | |
46 | extern void gsi_insert_seq_after (gimple_stmt_iterator *, gimple_seq, | |
47 | enum gsi_iterator_update); | |
48 | extern gimple_seq gsi_split_seq_after (gimple_stmt_iterator); | |
49 | extern void gsi_set_stmt (gimple_stmt_iterator *, gimple); | |
50 | extern void gsi_split_seq_before (gimple_stmt_iterator *, gimple_seq *); | |
51 | extern void gsi_replace (gimple_stmt_iterator *, gimple, bool); | |
52 | extern void gsi_replace_with_seq (gimple_stmt_iterator *, gimple_seq, bool); | |
53 | extern void gsi_insert_before_without_update (gimple_stmt_iterator *, gimple, | |
54 | enum gsi_iterator_update); | |
55 | extern void gsi_insert_before (gimple_stmt_iterator *, gimple, | |
56 | enum gsi_iterator_update); | |
57 | extern void gsi_insert_after_without_update (gimple_stmt_iterator *, gimple, | |
58 | enum gsi_iterator_update); | |
59 | extern void gsi_insert_after (gimple_stmt_iterator *, gimple, | |
60 | enum gsi_iterator_update); | |
61 | extern bool gsi_remove (gimple_stmt_iterator *, bool); | |
62 | extern gimple_stmt_iterator gsi_for_stmt (gimple); | |
63 | extern void gsi_move_after (gimple_stmt_iterator *, gimple_stmt_iterator *); | |
64 | extern void gsi_move_before (gimple_stmt_iterator *, gimple_stmt_iterator *); | |
65 | extern void gsi_move_to_bb_end (gimple_stmt_iterator *, basic_block); | |
66 | extern void gsi_insert_on_edge (edge, gimple); | |
67 | extern void gsi_insert_seq_on_edge (edge, gimple_seq); | |
68 | extern basic_block gsi_insert_on_edge_immediate (edge, gimple); | |
69 | extern basic_block gsi_insert_seq_on_edge_immediate (edge, gimple_seq); | |
70 | extern void gsi_commit_edge_inserts (void); | |
71 | extern void gsi_commit_one_edge_insert (edge, basic_block *); | |
72 | extern gimple_stmt_iterator gsi_start_phis (basic_block); | |
73 | ||
74 | /* Return a new iterator pointing to GIMPLE_SEQ's first statement. */ | |
75 | ||
76 | static inline gimple_stmt_iterator | |
77 | gsi_start_1 (gimple_seq *seq) | |
78 | { | |
79 | gimple_stmt_iterator i; | |
80 | ||
81 | i.ptr = gimple_seq_first (*seq); | |
82 | i.seq = seq; | |
83 | i.bb = i.ptr ? gimple_bb (i.ptr) : NULL; | |
84 | ||
85 | return i; | |
86 | } | |
87 | ||
88 | #define gsi_start(x) gsi_start_1 (&(x)) | |
89 | ||
90 | static inline gimple_stmt_iterator | |
91 | gsi_none (void) | |
92 | { | |
93 | gimple_stmt_iterator i; | |
94 | i.ptr = NULL; | |
95 | i.seq = NULL; | |
96 | i.bb = NULL; | |
97 | return i; | |
98 | } | |
99 | ||
100 | /* Return a new iterator pointing to the first statement in basic block BB. */ | |
101 | ||
102 | static inline gimple_stmt_iterator | |
103 | gsi_start_bb (basic_block bb) | |
104 | { | |
105 | gimple_stmt_iterator i; | |
106 | gimple_seq *seq; | |
107 | ||
108 | seq = bb_seq_addr (bb); | |
109 | i.ptr = gimple_seq_first (*seq); | |
110 | i.seq = seq; | |
111 | i.bb = bb; | |
112 | ||
113 | return i; | |
114 | } | |
115 | ||
116 | /* Return a new iterator initially pointing to GIMPLE_SEQ's last statement. */ | |
117 | ||
118 | static inline gimple_stmt_iterator | |
119 | gsi_last_1 (gimple_seq *seq) | |
120 | { | |
121 | gimple_stmt_iterator i; | |
122 | ||
123 | i.ptr = gimple_seq_last (*seq); | |
124 | i.seq = seq; | |
125 | i.bb = i.ptr ? gimple_bb (i.ptr) : NULL; | |
126 | ||
127 | return i; | |
128 | } | |
129 | ||
130 | #define gsi_last(x) gsi_last_1 (&(x)) | |
131 | ||
132 | /* Return a new iterator pointing to the last statement in basic block BB. */ | |
133 | ||
134 | static inline gimple_stmt_iterator | |
135 | gsi_last_bb (basic_block bb) | |
136 | { | |
137 | gimple_stmt_iterator i; | |
138 | gimple_seq *seq; | |
139 | ||
140 | seq = bb_seq_addr (bb); | |
141 | i.ptr = gimple_seq_last (*seq); | |
142 | i.seq = seq; | |
143 | i.bb = bb; | |
144 | ||
145 | return i; | |
146 | } | |
147 | ||
148 | /* Return true if I is at the end of its sequence. */ | |
149 | ||
150 | static inline bool | |
151 | gsi_end_p (gimple_stmt_iterator i) | |
152 | { | |
153 | return i.ptr == NULL; | |
154 | } | |
155 | ||
156 | /* Return true if I is one statement before the end of its sequence. */ | |
157 | ||
158 | static inline bool | |
159 | gsi_one_before_end_p (gimple_stmt_iterator i) | |
160 | { | |
161 | return i.ptr != NULL && i.ptr->gsbase.next == NULL; | |
162 | } | |
163 | ||
164 | /* Advance the iterator to the next gimple statement. */ | |
165 | ||
166 | static inline void | |
167 | gsi_next (gimple_stmt_iterator *i) | |
168 | { | |
169 | i->ptr = i->ptr->gsbase.next; | |
170 | } | |
171 | ||
172 | /* Advance the iterator to the previous gimple statement. */ | |
173 | ||
174 | static inline void | |
175 | gsi_prev (gimple_stmt_iterator *i) | |
176 | { | |
177 | gimple prev = i->ptr->gsbase.prev; | |
178 | if (prev->gsbase.next) | |
179 | i->ptr = prev; | |
180 | else | |
181 | i->ptr = NULL; | |
182 | } | |
183 | ||
184 | /* Return the current stmt. */ | |
185 | ||
186 | static inline gimple | |
187 | gsi_stmt (gimple_stmt_iterator i) | |
188 | { | |
189 | return i.ptr; | |
190 | } | |
191 | ||
192 | /* Return a block statement iterator that points to the first non-label | |
193 | statement in block BB. */ | |
194 | ||
195 | static inline gimple_stmt_iterator | |
196 | gsi_after_labels (basic_block bb) | |
197 | { | |
198 | gimple_stmt_iterator gsi = gsi_start_bb (bb); | |
199 | ||
200 | while (!gsi_end_p (gsi) && gimple_code (gsi_stmt (gsi)) == GIMPLE_LABEL) | |
201 | gsi_next (&gsi); | |
202 | ||
203 | return gsi; | |
204 | } | |
205 | ||
206 | /* Advance the iterator to the next non-debug gimple statement. */ | |
207 | ||
208 | static inline void | |
209 | gsi_next_nondebug (gimple_stmt_iterator *i) | |
210 | { | |
211 | do | |
212 | { | |
213 | gsi_next (i); | |
214 | } | |
215 | while (!gsi_end_p (*i) && is_gimple_debug (gsi_stmt (*i))); | |
216 | } | |
217 | ||
218 | /* Advance the iterator to the next non-debug gimple statement. */ | |
219 | ||
220 | static inline void | |
221 | gsi_prev_nondebug (gimple_stmt_iterator *i) | |
222 | { | |
223 | do | |
224 | { | |
225 | gsi_prev (i); | |
226 | } | |
227 | while (!gsi_end_p (*i) && is_gimple_debug (gsi_stmt (*i))); | |
228 | } | |
229 | ||
230 | /* Return a new iterator pointing to the first non-debug statement in | |
231 | basic block BB. */ | |
232 | ||
233 | static inline gimple_stmt_iterator | |
234 | gsi_start_nondebug_bb (basic_block bb) | |
235 | { | |
236 | gimple_stmt_iterator i = gsi_start_bb (bb); | |
237 | ||
238 | if (!gsi_end_p (i) && is_gimple_debug (gsi_stmt (i))) | |
239 | gsi_next_nondebug (&i); | |
240 | ||
241 | return i; | |
242 | } | |
243 | ||
244 | /* Return a new iterator pointing to the first non-debug non-label statement in | |
245 | basic block BB. */ | |
246 | ||
247 | static inline gimple_stmt_iterator | |
248 | gsi_start_nondebug_after_labels_bb (basic_block bb) | |
249 | { | |
250 | gimple_stmt_iterator i = gsi_after_labels (bb); | |
251 | ||
252 | if (!gsi_end_p (i) && is_gimple_debug (gsi_stmt (i))) | |
253 | gsi_next_nondebug (&i); | |
254 | ||
255 | return i; | |
256 | } | |
257 | ||
258 | /* Return a new iterator pointing to the last non-debug statement in | |
259 | basic block BB. */ | |
260 | ||
261 | static inline gimple_stmt_iterator | |
262 | gsi_last_nondebug_bb (basic_block bb) | |
263 | { | |
264 | gimple_stmt_iterator i = gsi_last_bb (bb); | |
265 | ||
266 | if (!gsi_end_p (i) && is_gimple_debug (gsi_stmt (i))) | |
267 | gsi_prev_nondebug (&i); | |
268 | ||
269 | return i; | |
270 | } | |
271 | ||
272 | /* Return the basic block associated with this iterator. */ | |
273 | ||
274 | static inline basic_block | |
275 | gsi_bb (gimple_stmt_iterator i) | |
276 | { | |
277 | return i.bb; | |
278 | } | |
279 | ||
280 | /* Return the sequence associated with this iterator. */ | |
281 | ||
282 | static inline gimple_seq | |
283 | gsi_seq (gimple_stmt_iterator i) | |
284 | { | |
285 | return *i.seq; | |
286 | } | |
287 | ||
288 | #endif /* GCC_GIMPLE_ITERATOR_H */ |